Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Mukai, Masayuki; Tanaka, Tadao; Maeda, Toshikatsu; Ogawa, Hiromichi; Matsumoto, Junko; Munakata, Masahiro; Zhao, Y.*; Guo, Z.*; Ni, S.*; Li, S.*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(3), p.342 - 349, 2003/09
Evaluation of radionuclide migration in geologic media is of great importance in safety assessment for shallow land disposal specially for TRU nuclides because of inadequate data based on field test. As a cooperative research between JAERI and CIRP, a field test of radionuclide migration was conducted under natural condition using Sr-90, Np-237 and Pu-238 to obtain migration data of the radionuclides in actual aerated layer under natural rainfall condition. Values of input parameters to an existing evaluation equation of nuclide migration were determined on the basis of the results of laboratory experiments of batch and column methods and field investigation. Migration distribution of the radionuclides calculated with the determined values showed reasonable agreement with the measured distribution of the field test. This confirmed an applicability of the evaluation equation for radionuclide migration to actual aerated layer under natural condition.
Tanaka, Tadao; Mukai, Masayuki; Munakata, Masahiro; Maeda, Toshikatsu; Ogawa, Hiromichi; Wang, Z.*; Li, S.*; Yang, Y.*; Zhao, Y.*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(3), p.350 - 360, 2003/09
Migration data of 
Sr,
Np and 
Pu in natural aquifer were collected by a field test, which was performed in an aquifer at 30 m under ground surface of the field test site. Migration parameters for analysis of the results obtained the field test were measured by laboratory column tests and batch tests. Diffusion coefficient corresponding to water velocity was determined from the relationship between water velocity and diffusion length, which obtained from the column tests. Distribution coefficient was determined by considering confident ability of data, test conditions, and environmental conditions. One dimensional migration behavior of the radionuclides in aquifer, calculated by using the migration parameters obtained from the batch and column tests, agreed with the results obtained from the field test. It was confirmed that the migration behavior of alpha-nuclides could be evaluated by applying the conventional equation for evaluating the radionuclide migration and the migration parameters obtained from laboratory tests.
Ogawa, Hiromichi; Tanaka, Tadao; Mukai, Masayuki; Maeda, Toshikatsu; Munakata, Masahiro; Matsumoto, Junko; Bamba, Tsunetaka; Li, S.*; Wang, Z.*; Li, Z.*; et al.
Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(3), p.332 - 335, 2003/09
The filed migration test using TRU nuclide was carried out as a cooperative research project between JAERI and CIRP (China Institute for Radiation Protection). This report introduced the outline of the filed migration test and described the outline of the special number of Field Test on Migration of TRU-nuclide and main results as a summary report.
Li, Y.*; Kato, Daisuke*; Shibata, Katsuyuki; Onizawa, Kunio
Nihon Kikai Gakkai Rombunshu, A, 69(678), p.239 - 245, 2003/02
no abstracts in English
Sr, Np, Pu and 
Am in loess media (Joint research)Tanaka, Tadao; Mukai, Masayuki; Maeda, Toshikatsu; Matsumoto, Junko; Ogawa, Hiromichi; Li, S.*; Wang, Z.*; Wang, J.*; Guo, Z.*; Zhao, Y.*
JAERI-Research 2002-034, 20 Pages, 2002/12
JAERI-Research-2002-034.pdf:1.1MB
Adsorption mechanisms and models of Sr(II), Np(V), Pu(IV) and Am(III) on the loess were investigated from their adsorption and desorption properties. The distribution coefficient of Sr and Np was 2 - 3 orders of magnitude smaller than that of Pu and Am. The adsorption of Sr and Np was mainly controlled by the ion exchange reaction. On the other hand, the adsorption of Pu and Am was mostly controlled by the selective chemical reactions with Fe and Mn oxyhydroxide/oxide and humic substances. On the basis of the experimental results, several types of adsorption models of the radionuclides, considering elemental concentrations, adsorption mechanisms and kinetics, were proposed for setting up the analytical systems of radionuclide migration in the loess media.
Shibata, Katsuyuki; Onizawa, Kunio; Li, Y.*; Kato, Daisuke*
Proceedings of 4th International Workshop on the Integrity of Nuclear Components, p.31 - 41, 2002/00
no abstracts in English
Shibata, Katsuyuki; Kato, Daisuke*; Li, Y.*
Nuclear Engineering and Design, 208(1), p.1 - 13, 2001/08
Times Cited Count：21 Percentile：79.02(Nuclear Science & Technology)no abstracts in English
ion implanted SUS304 stainless steel by in situ SR-XPS and ex situ scanning tunnelling microscopeLi, Y.; Baba, Yuji; Sekiguchi, Tetsuhiro
Corrosion Science, 43(5), p.903 - 917, 2001/05
Times Cited Count：15 Percentile：62.61(Materials Science, Multidisciplinary)no abstracts in English
Li, Y.*; Kato, Daisuke*; Shibata, Katsuyuki; Onizawa, Kunio
International Journal of Pressure Vessels and Piping, 78(4), p.271 - 282, 2001/04
Times Cited Count：5 Percentile：40.50(Engineering, Multidisciplinary)no abstracts in English
Shibata, Katsuyuki; Onizawa, Kunio; Li, Y.*; Kato, Daisuke*
JAERI-Data/Code 2001-011, 233 Pages, 2001/03
JAERI-Data-Code-2001-011.pdf:7.42MB
no abstracts in English
Shibata, Katsuyuki; Onizawa, Kunio; Kato, Daisuke*; Li, Y.*
Nihon Kikai Gakkai 2001-Nendo Nenji Taikai Koen Rombunshu, p.389 - 390, 2001/00
no abstracts in English
Kato, Daisuke*; Li, Y.*; Shibata, Katsuyuki; Onizawa, Kunio
Nihon Kikai Gakkai 2001-Nendo Nenji Taikai Koen Rombunshu, p.391 - 392, 2001/00
no abstracts in English
-ion implanted SUS304 stainless steel by in situ SR-XPS, 1; Oxidation behaviorsLi, Y.; Baba, Yuji; Sekiguchi, Tetsuhiro
Journal of Chinese Society for Corrosion and Protection, 20(6), p.321 - 330, 2000/12
no abstracts in English
-ion implanted SUS304 stainless steel by in situ SR-XPS, 2; Chemical state of oxygenLi, Y.; Baba, Yuji; Sekiguchi, Tetsuhiro
Journal of Chinese Society for Corrosion and Protection, 20(6), p.331 - 337, 2000/12
no abstracts in English
XPS using synchrotron radiationLi, Y.; Baba, Yuji; Sekiguchi, Tetsuhiro
Journal of Materials Science, 35(24), p.6123 - 6130, 2000/12
Times Cited Count：4 Percentile：20.97(Materials Science, Multidisciplinary)no abstracts in English
produced by low-energy ion implantationAli, M.; Baba, Yuji; Sekiguchi, Tetsuhiro; Li, Y.; Yamamoto, Hiroyuki
Photon Factory Activity Report 1998, P. 36, 1999/11
no abstracts in English
S) on Si(100) following excitation of adsorbate or substrate core levelSekiguchi, Tetsuhiro; Baba, Yuji; Li, Y.; Ali, M.
Photon Factory Activity Report 1998, Part B, P. 67, 1999/11
no abstracts in English
